In the development section of the Classical Sonata Form, what characterizes the material?

• A. Exposition material altered, creating tension
• B. Return to the initial subject in the tonic
• C. Introduction of a new theme in a related key
• D. Final statement of the main theme in the dominant key

Answer: (A)

In the development, the ideas heard in the exposition are transformed and explored in new ways. Composers take those motifs, break them into fragments, alter them rhythmically, and move through a variety of keys—often to distant or unexpected ones—to build tension and instability. This process of modification and modulation is what creates forward momentum toward the eventual return to the home key in the recapitulation.

So the best description is that development consists of exposition material being altered and developed to heighten tension. Returning to the initial subject in the tonic signals the recapitulation, not the development; introducing a new theme or presenting a final dominant restatement can occur, but they’re not defining features of the development itself.